What is "lithotome"

Lithotome \Lith"o*tome\, n. [Gr. ? cutting stones; li`qos stone + ? to cut: cf. F. lithotome.]

1. A stone so formed by nature as to appear as if cut by art.

2. (Surg.) An instrument used for cutting the bladder in operations for the stone.

n. 1 A stone so formed by nature as to appear as if cut by art. 2 (context surgery English) An instrument used for cutting the bladder in operations for the stone.